128 lines
3.4 KiB
ReStructuredText
128 lines
3.4 KiB
ReStructuredText
.. _arc_secure_service:
|
|
|
|
ARC Secure Service
|
|
##################
|
|
|
|
Overview
|
|
********
|
|
|
|
This sample implements a simple secure service based on ARC SecureShield to
|
|
demonstrate how a secure zephyr application runs together with a normal
|
|
Zephyr application.
|
|
|
|
In this sample:
|
|
|
|
* Secure application will be in the secure memory space defined in
|
|
``arc_mpu_regions.c``. Half of RAM and ROM is allocated to secure world,
|
|
the other half is allocated to normal world.
|
|
|
|
* Memory not allocated to the secure application is allocated to
|
|
the normal application.
|
|
|
|
* By default, all the peripheral space is normal mode accessible, i.e.,
|
|
the peripherals are shared between normal mode and secure mode. If some
|
|
peripherals are required by secure world, it can be done by adding static
|
|
mpu entry in ``arc_mpu_regions.c``.
|
|
|
|
* The interrupts of two internal timers are configure as normal interrupts,
|
|
so the normal zephyr's kernel tick can work correctly.
|
|
|
|
* Secure interrupts priority > secure threads priority > normal interrupts
|
|
priority > normal threads priority.
|
|
|
|
|
|
Requirements
|
|
************
|
|
|
|
To use this sample, ARC processor should be equipped with ARC SecureShield. In
|
|
Zephyr, the following board configurations are supported:
|
|
|
|
* em_starterkit_em7d
|
|
* secure application: em_starterkit_em7d_secure
|
|
* normal application: em_starterkit_em7d_normal
|
|
* nsim_sem
|
|
* secure application: nsim_sem
|
|
* normal application: nsim_sem_normal
|
|
|
|
Building and Running
|
|
********************
|
|
|
|
Building
|
|
========
|
|
|
|
Secure application
|
|
^^^^^^^^^^^^^^^^^^
|
|
|
|
First, you should build the secure application.
|
|
|
|
.. zephyr-app-commands::
|
|
:zephyr-app: samples/boards/arc_secure_services
|
|
:board: em_starterkit_em7d_secure nsim_sem
|
|
:goals: build
|
|
:compact:
|
|
|
|
Normal application
|
|
^^^^^^^^^^^^^^^^^^
|
|
|
|
Currently, in normal application, MPU is not accessible, so no user space and
|
|
mpu-based stack checking. Please copy the specific dts file and def_config
|
|
file to the specific board dir to build normal application.
|
|
|
|
Here,take :ref:'dining-philosophers-sample' as an example for normal
|
|
application.
|
|
|
|
.. zephyr-app-commands::
|
|
:zephyr-app: samples/philosophers
|
|
:board: em_starterkit_em7d_normal nsim_sem_normal
|
|
:goals: build
|
|
:compact:
|
|
|
|
Running
|
|
=======
|
|
|
|
* Run using the bootloader
|
|
|
|
The bootloader should load the secure and normal application into the correct place,
|
|
then jump to the entry of the secure application. The entry of normal application
|
|
is hardcoded in secure application. Secure application will boot normal application.
|
|
|
|
* Run using the debugger (recommended)
|
|
|
|
Use the gdb debugger to load and run the two applications.
|
|
|
|
For em starter kit, run the following commands
|
|
|
|
.. code-block:: console
|
|
|
|
# load secure application first
|
|
$ cd samples/boards/arc_secure_services/build
|
|
$ west debug
|
|
# load normal application
|
|
$ monitor load_image ../../../philosophers/build/zepher/zephyr.elf
|
|
$ c
|
|
|
|
For nsim sem, you need two consoles: one for application output, and one for
|
|
debugger.
|
|
|
|
In the console for output:
|
|
|
|
.. code-block:: console
|
|
|
|
# open debug server
|
|
$ cd samples/boards/arc_secure_services/build
|
|
$ west debugserver
|
|
|
|
In the console for debugger:
|
|
|
|
.. code-block:: console
|
|
|
|
# open debug server
|
|
$ cd samples/boards/arc_secure_services/build
|
|
$ arc-elf32-gdb zephyr/zephyr.elf
|
|
$ target remote :3333
|
|
# load normal application
|
|
$ load ../../../philosophers/build/zepher/zephyr.elf
|
|
# load secure application
|
|
$ load
|
|
$ c
|